Saw-mill head-block



' (No Model.)

T." s. WILKIN. SAW'MILL'HBADBLQGK.

Patented Jan. 1, 1884.

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THEODORE S. WILKIN, OF MILWAUKEE VVISGONSIN.

sAw'fMlLL HEAD-BLOCK.

SPECIFICATION forming part f Letters Patent No. 291,453, dated January 1, 1884. ,j

A Application filed November 15, 1883. (No model.)

`move back in case of contact with the log turner bar or other unyielding obstacle, so as to prevent the breaking of the nose.

In the accompanying drawings, Figure 1 represents a top plan view, and Fig. l2 a side elevation, of my improved head-block.

It has been the custom heretofore to cast such head-blocks with a rigid nose or, fore head-block. Such head-blocks,beingmounted end integral withthe body, and until recently to make the side faces of such nose straight, as simple continuations `of the sides of the `upon the carriage and the latter caused to traverse its track to carry the log past the saw,` frequently have the nose or fore end broken by coming into contact with some unyieldi ing obstacle-as, for` instance, the log-turner bar. This difficulty can be in a measure obviated by bevelingoff the sides of the nose, so that in meeting with an obstruction they will force the same aside, and thus prevent iny jury. i This feature, though shown in my draw` ings, is not claimed in this case.

While such beveling of thenose in a measure relieves the diiculty, there are many cases in which such jss 1 by without injury.

In practice I prefer to connect the nose tol `:5o a sliding joint, with or without springs to provision is insufficient-as, for instance, where there is not sufficient space for the ob-` struction to be moved aside, or where it is so firm and unyielding as to resist the force of the pressure against'it-in which case the nose of the head-block, or some other part of the machinery, must giveway. I therefore make the nose or fore end of the head-block sepa-` rate from the main body and attach it thereto` in such manner that upon meeting with a for` midable obstruction it can move back and pass the head-block by a hinge-joint;` but I wish it to be understood that it may be applied in any equivalent manner-as, for instance, with keep it normally out to place-the invention consisting, broadly, in providing a head-block with a yielding nose .to permit it to pass obstructions without injury.

The drawings illustrate the preferred construction.

Aindicates the head-block as awhole, which in use is mounted upon a trucker carriage, as is well understood by all familiar with this class of machinery, and B the nose. sectionB is pivoted or jointed to the headblock A by a pivot bolt or rod, C, passing through ears a b, formed on the nose-section, and through the body of the headblock and lugs or ears c, formed thereon outside of the vertical faces of the head-block, as shown in Fig. l. The forward end of the head-block is advisably cut away slightly on each side, to receive the ears a of the nose-section andpermit them to come iiush with the side faces,

'and the ears` Z are carried outside of the lugs or ears c, for the double purpose of giving a The nosewider support to the nose-section, and of getf ting additional ,width sufficient to allow for the beveling of the faces of the nose without narrowing its front end more than usual.. rIhe section B is free to swing upward, and as its beveled faces c are above the pivot C, it will naturally swing thus upward upon meeting with any obstruction; but its downward movement is limited by a stop or rest, D, formed upon the head-block, beneath the nose-section, and by a stop-face, d, formed upon the inner or rear end of each ear a, engaging with a like stop-face, e, on the head-block, as plain` ly shown in Fig. 2. In this way the noseB is prevented from falling below a horizontal plane, or below the face of the head-block, but is caused to rest normally in line therewith and to form a continuation thereof.

In Fig. 1 the manner of beveling the verti` cal faces of the nose-section B is plainly shown. This beveling, though not absolutely essential, is advisable, and facilitates and insures the t'elevation or moving back of the nose-section.

Having thus described my invention, what I claim is- 1. A head-block provided with a movable nose-section or fore end adapted to yield when encountering an obstruction, substantially as and for the purpose explained.

IOO

2. In combination with a saW- mill headiiXed stop to limit the descent of the nose-sec block, a separate nose or fore end connected tion. therewith by ahinge or joint, substantially as 5. In combination with head-block A, hav- 15 shown and described. ing ears c, nose-section B, having ears a b, 5 3. In combination With a saw-mill headpivot-bolt G, and stop or rest to limit the deblock, substantially as shown, a fore end or scent of the nose-section, substantially as nosesection pivoted thereto, and having its shown.

Vertical faces beveled from the sides inward a T toward the middle, substantially as 'and for THEODORE b' WILKH" 1o the purpose explained. Witnesses:

4. In combination with a head-block and a WM. W. ALLIs, fore end or nose-section pivoted thereto, a THEoDoRE F. WAMBOLD. 

